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2030 SE Marine Science Dr, Newport, OR 97365

Free Event

Speaker: Jonathan Allan, Ph.D, RG | Coastal GeomorphologistOregon Department of Geology and Mineral Industries 

Topic: Minutes Count: In Preparation for the Next Great Cascadia Earthquake and Tsunami

 

Geologic evidence from the past 10,000 years indicates the occurrence of 19 great earthquakes that ruptured the full margin of the Cascadia subduction zone (CSZ). The average recurrence interval of these large earthquake events is about 500 years. An additional 26 smaller earthquakes with associated surface ruptures, have occurred along the southern Oregon coast and northern California over the last 10,000 years, giving a combined average recurrence of about 220 years between events. Geologists estimate there is about a 16-22% chance of a CSZ earthquake taking place in the next 50 years, while the odds of a partial rupture on the southern Oregon coast are much higher at about 37-43%.  Were such an event to take place today, the effects would be catastrophic. Between 2010 and 2013, the Oregon Department of Geology and Mineral Industries (DOGAMI) completed coastwide tsunami inundation modeling. The focus of DOGAMI has since moved to: 1) evaluating evacuation routes and required travel speeds needed to “beat the wave” to high ground; 2) undertaking new maritime modeling in key ports and harbors; and, 3) assessing risks using the FEMA Hazus model to evaluate the potential for casualties, building exposure, damage, and losses for potentially impacted communities. Come join us to learn more about these new mapping products and methods for mitigating the potential large loss of life from a CSZ event.

  • Sarah Wolf
  • Jackie Beauchene
  • Kathryn Goetting

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        US: +1 971 247 1195 

Webinar ID: 949 5592 7799

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